<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=`, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        body {
            background: url(images/bg.jpg);
            background-size: cover;
        }
        ul {
            position: relative;
            margin: 400px auto;
            transform: scale(1.5);
        }
        ul li {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%,-50%);
            border: 1px solid #222;
            border-radius: 50%;
            list-style: none;
            background-image: url(images/asteroids_meteorids.png);
        }
        ul li::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: yellow;
            transform: translate(-50%,-50%);
        }
        ul li:nth-child(1) {
            width: 50px;
            height: 50px;
            background:url(images/asteroids_meteorids.png) ,radial-gradient(yellow,yellow 30%, #000 50%, #000 100%);
            animation: rotate 2s linear infinite;
        }
       
        ul li:nth-child(2) {
            width: 100px;
            height: 100px;
            animation: rotate 6s linear infinite;
        }
        
        ul li:nth-child(3) {
            width: 150px;
            height: 150px;
            animation: rotate 18s linear infinite;
        }
        ul li:nth-child(4) {
            width: 200px;
            height: 200px;
            animation: rotate 20s linear infinite;
        }
        ul li:nth-child(5) {
            width: 250px;
            height: 250px;
            animation: rotate 26s linear infinite;
        }
        ul li:nth-child(6) {
            width: 300px;
            height: 300px;
            animation: rotate 21s linear infinite;
        }
        ul li:nth-child(6) > span {
            position: absolute;
            left: 50%;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            animation: rotate 1s linear infinite;
        }
        ul li:nth-child(6) > span::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background-color: blue;
            transform: translate(-50%,-50%);
        }
        ul li:nth-child(7) {
            width: 350px;
            height: 350px;
            animation: rotate 40s linear infinite;
        }
        ul li:nth-child(8) {
            width: 400px;
            height: 400px;
            animation: rotate 55s linear infinite;
        }
        ul li:nth-child(9) {
            width: 450px;
            height: 450px;
            animation: rotate 67s linear infinite;
        }
        @keyframes rotate {
            from {
                transform: translate(-50%,-50%) rotate(0deg);
            }
            to {
                transform: translate(-50%,-50%) rotate(360deg);
            }
        }
    </style>
</head>
<body>
    <ul>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li><span></span></li>
        <li></li>
        <li></li>
        <li></li>
    </ul>
</body>
</html>